Merge pull request #406 from orottier/bugfix/panic-low-sample-rate

Avoid HRTF panic when constructing an AudioContext with low sample rate

src/node/panner.rs

@@ -24,6 +24,11 @@ pub(crate) fn load_hrtf_processor(sample_rate: u32) -> (HrtfProcessor, usize) {
     static INSTANCE: OnceLock<Mutex<HashMap<u32, (HrtfProcessor, usize)>>> = OnceLock::new();
     let cache = INSTANCE.get_or_init(|| Mutex::new(HashMap::new()));
 
+    // There's an upstream bug for low sample rates, so work around it by forcing sample_rate to be
+    // 27k minimum. The HRTF response will be a bit distorted but I assume you won't be using it
+    // anyway when running these low sample rates. <https://github.com/mrDIMAS/hrtf/issues/9>
+    let sample_rate = sample_rate.max(27_000);
+
     // To avoid poisening the cache mutex, don't use the `entry()` API on HashMap
     {
         if let Some(value) = cache.lock().unwrap().get(&sample_rate) {

tests/online.rs

@@ -108,14 +108,14 @@ fn test_none_sink_id() {
 }
 
 #[test]
-#[should_panic] // https://github.com/mrDIMAS/hrtf/issues/9
 fn test_weird_sample_rate() {
     let options = AudioContextOptions {
         sink_id: "none".into(),
         sample_rate: Some(24000.),
         ..AudioContextOptions::default()
     };
 
+    // would crash due to <https://github.com/mrDIMAS/hrtf/issues/9>
     let _ = AudioContext::new(options);
 }